   the fill method will not affect the color of a line. 2D lines are
   drawn with a width of one pixel by default, but this can be changed
   with the stroke-weight function. The version with six parameters
-  allows the line to be placed anywhere within XYZ space. "
+  allows the line to be placed anywhere within XYZ space."
   ([p1 p2] (apply line (concat p1 p2)))
   ([x1 y1 x2 y2] (.line (current-graphics) (float x1) (float y1) (float x2) (float y2)))
   ([x1 y1 z1 x2 y2 z2]

  direction. Transformations apply to everything that happens after
  and subsequent calls to the function accumulates the effect. For
  example, calling (rotate HALF-PI) and then (rotate HALF-PI) is the
  same as (rotate PI). All tranformations are reset when draw begins
  again.

  Technically, rotate multiplies the current transformation matrix by

  "Adjusts the character and level of detail produced by the Perlin
  noise function. Similar to harmonics in physics, noise is computed
  over several octaves. Lower octaves contribute more to the output
  signal and as such define the overall intensity of the noise, whereas
  higher octaves create finer grained details in the noise
  sequence. By default, noise is computed over 4 octaves with each
  octave contributing exactly half than its predecessor, starting at
